2150t/h切圆燃烧锅炉低氧燃烧的试验研究

doi:10.11930/j.issn.1004-9649.2013.7.29.5

摘要/Abstract

摘要： 为了给锅炉低氧燃烧优化提供依据,在2 150 t/h四角切圆燃烧锅炉上进行了燃烧试验,以研究降低炉内氧量对锅炉燃烧的影响。结果表明：稳定工况下,炉膛温度随氧量变化存在一个峰值点,在峰值点两侧,降低氧量对燃烧和锅炉运行参数的影响不同;NO_x排放在炉膛温度峰值点附近存在一个峰值点,在深度降低氧量时存在一个谷值点,仅当氧量位于峰谷值中间区域时,降低氧量能够降低NO_x排放;降低氧量将加大稳定工况的旋流指数和降负荷过程中旋流指数的变化幅度,易引起蒸汽温度偏差大、超温等问题;当降低氧量未使锅炉不完全燃烧热损失明显增加时,会加大变负荷过程炉温、NO_x排放波动幅度,反之,变负荷时风量改变对燃煤放热量的影响,会使负荷变化对炉膛温度、NO_x排放影响降至很小。

关键词: 切圆燃烧锅炉, 低氧燃烧, 炉膛温度, 蒸汽温度, NOx排放

Abstract: In order to provide bases for the optimization of boiler low-oxygen combustion, experiments are performed on a 2 150-t/h tangentially fired boiler to study the influence of oxygen reduction on boiler combustion. The results show that under stable conditions, there is a peak value of the furnace temperature in the change of oxygen; on the upper and lower sides of the peak, the effects of oxygen reduction on combustion and boiler operation parameters are different. As oxygen varies, NO_x emission has a peak value near the peak value of the furnace temperature, and a valley value in deep low-oxygen combustion. Decreasing oxygen can reduce NO_x emissions only if the oxygen level lies between the peak and valley values of NO_x emissions. Reducing oxygen enlarges the swirl number under steady operating conditions and the variation amplitude of swirl number in load decreasing, which easily leads to large steam temperature deviation and overheating. Oxygen reduction, which does not make obvious rise of the incomplete combustion loss, will enlarge the fluctuation range of the furnace temperature and NO_x emissions in load changes. And conversely, if the incomplete combustion loss markedly increases, the load change has little effect on the furnace temperature and NO_x emissions because of the influence of air flow on coal releasing heat.

Key words: tangentially fired boiler, low-oxygen combustion, furnace temperature, steam temperature, NOx emission

中图分类号:

TK227

靳允立. 2150t/h切圆燃烧锅炉低氧燃烧的试验研究[J]. 中国电力, 2013, 46(7): 29-34.

JIN Yun-li. Experimental Study of Low-Oxygen Combustion on 2 150-t/h Tangentially Fired Boilers[J]. Electric Power, 2013, 46(7): 29-34.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.2013.7.29.5

https://www.electricpower.com.cn/CN/Y2013/V46/I7/29

参考文献

[1] 梁立刚,孟勇,吴生来. 1 025 t/h锅炉运行优化调整及NO x 排放特性试验研究[J]. 动力工程学报,2010,30（10）：727-732.
LIANG Li-gang, MENG Yong, WU Sheng-lai. Experimental study on optimal adjustment and NO x emission of a 1 025 t/h boiler [J]. Journal of Chinese Society of Power Engineering, 2010, 30(10): 727-732.
[2] 殷立宝. 基于经济性和环保特性的燃煤电站锅炉运行氧量优化试验研究[J]. 锅炉技术,2011,42（6）：41-44.
YIN Li-bao. Study on operation oxygen based on efficiency and pollutant discharge [J]. Boiler Technology, 2011, 42(6): 41-44.
[3] 曾培强,郑伟林,刘道鹏.黄埔电厂1 025 t/h锅炉低氧燃烧优化试验[J]. 热力发电,2010,39（7）：40-42.
ZENG Pei-qiang, ZHENG Wei-lin, LIU Dao-peng. Low oxygen combustion optimization test of 1 025 t/h boiler in Huangpu power plant [J]. Thermal Power Generation, 2010, 39(7): 40-42.
[4] 陈振龙. 神华煤低氧燃烧效果及应注意的问题[J]. 热力发电,2011,40（1）：55-57.
CHEN Zhen-long. Effectiveness in low oxygen burning of Shenhua coal and problems needing to pay attention[J]. Thermal Power Generation, 2011, 40(1): 55-57.
[5] 肖海平,张千,王磊,等. 燃烧调整对NO x 排放及锅炉效率的影响[J].中国电机工程学报,2011,31（8）：1-6.
XIAO Hai-ping, ZHANG Qian, WANG Lei, et al . Effect of combustion adjustment on NO x emission and boiler efficiency [J]. Proceedings of the CSEE, 2011, 31(8): 1-6.
[6] 蔡杰进,马晓茜,廖艳芬. 锅炉运行性能与烟气含氧量优化研究[J]. 热力发电,2006,35（7）：28-30.
CAI Jie-jin, MA Xiao-qian, LIAO Yan-fen. Study on boiler’s operation performance and optimization of oxygen content in flue gas [J]. Thermal Power Generation, 2006, 35(7): 28-30.
[7] 周国民.燃煤锅炉低氧燃烧降低NO x 排放特性及节能分析[J].电站系统工程,2006,22（5）：29-31.
ZHOU Guo-min. Experiment research on low NO x emission with low oxygen combustion of pulverized-coal fired boiler and analysis of energy saving [J]. Power System Engineering, 2006, 22(5): 29-31.
[8] 王长安,刘银河,车得福. 低氧浓度下煤燃烧特性的热重实验研究[J]. 工程热物理学报,2010,31（10）：1785-1788.
WANG Chang-an, LIU Yin-he, CHE De-fu. Experimental investigation on combustion characteristics of coals in low oxygen concentration with thermogravimetry[J]. Journal of Engineering Thermophysics, 2010, 31(10): 1785-1788.
[9] 应明良,潘国清,戴成峰,等. 600 MW机组四角切圆锅炉低氮燃烧改造及运行调整[J]. 中国电力,2012,45（4）：54-58.
YING Ming-liang, PAN Guo-qing, DAI Cheng-feng, et al . Low NO x combustion reformation and operation adjustment in 600 MW tangential firing boiler [J]. Electric Power, 2012, 45(4): 54-58.
[10] 王春昌.空气分级低NO x 燃烧技术的运行费用及工程应用[J].中国电力,2011,44（7）：49-52.
WANG Chun-chang. Operation cost and engineering application of low NO x staged combustion technology for air[J]. Electric Power, 2011, 44(7): 49-52.
[11] MAN C K, GIBBINS J R, WITKAMP J G, et al . Coal characterization for NO x prediction in air-staged combustion of pulverized coals [J]. Fuel, 2005, 84(17): 2190-2195.
[12] 刘泰生,姚本荣,许晋源. 切向燃烧锅炉水平烟道中烟速偏差成因的试验研究[J]. 中国电机工程学报,2002,22（1）：49-53.
LIU Tai-sheng, YAO Ben-rong, XU Jin-yuan. The research of the cause of velocity imbalance in a tangentially-fired furnace[J]. Proceedings of the CSEE, 2002, 22(1): 49-53.
[13] 周月桂,章明川,徐通模,等. 四角切圆燃烧锅炉烟道烟速偏差的实验研究与数值模拟[J]. 中国电机工程学报,2001,21（1）： 68-72.
ZHOU Yue-gui, ZHANG Ming-chuan, XU Tong-mo, et al . Experimental and numerical study on the flue gas velocity deviation in a tangentially fired boiler furnace[J]. Proceedings of the CSEE, 2001, 21(1): 68-72.
[14] 李彦鹏,徐益谦,刁永发,等. 切向燃烧锅炉炉膛内旋流数分布的研究[J]. 热能动力工程,2001,16（5）：477-480.
LI Yan-peng, XU Yi-qian, DIAO Yong-fa, et al . An investigation of the distribution of swirl numbers in the furnace of a tangentially fired boiler[J]. Journal of Engineering for Thermal Energy and Power, 2001, 16(5): 477-480.
[15] 刘泰生,沈凌,姚本荣,等. 炉内旋流数对热偏差影响的理论和试验研究[J]. 热能动力工程,2003,18（4）：356-360.
LIU Tai-sheng, SHEN Ling, YAO Ben-rong, et al . Theoretical and experimental study of the impact of in-boiler swirl number on the thermal deviation in a reheater[J]. Journal of Engineering for Thermal Energy and Power, 2003, 18(4): 356-360.
[16] 王波勇. 湛江发电厂1号锅炉再热器烟温、汽温偏差分析和改造方案[J]. 电力建设,2001,22（12）：20-22.
WANG Bo-yong. Analysis on deflection of flue gas and steam temperature of reheater in No.1 boiler and its retrofitting scheme in Zhanjiang Power Plant [J]. Electric Power Construction, 2001, 22(12）: 20-22.
[17] 赵振宁,王晶晶,徐立伟,等. 300 MW锅炉再热汽温低的原因分析及改造[J]. 中国电力,2012,45（12）：21-25.
ZHAO Zhen-ning, WANG Jing-jing, XU Li-wei, et al . Cause analysis for low reheat steam temperature and transformations of 300-MW boilers [J]. Electric Power, 2012, 45(12): 21-25.